Moldboard apparatus



Dec. 9, 1952 Filed Oct. 24, 1950 F. SCHARSACH MOLDBOARD APPARATUS 2 sHEETsf-SHEET 1 Fig 5 JNVENToR.

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Patented Dec. 9, 1952 "UNITED STATES cargar oFFlcs Application October 24, 1950, Serial No. 191,820 In Austria November 4, 1949 My invention relates generally to a mouldboard apparatus utilized for the erection of concrete and similar cast structures, more particularly to an apparatus of this kind comprising several mould-boards which are lifted after moulding and setting of a concrete layer, so as to serve as a mould or form for pouring the next higher concrete layer again and again. The apparatus of my invention is suitable for building particularly large concrete structures, such asA dams for power basinsof Water power plants, as well as for erecting walls of a house and the like.

Especially in the building of particularly large concrete structures, the weight of the vertically adjustable mould-boards is very considerable so that itY is extremely troublesome and takes up much time, to lift the heavy boards and to bring them in correct position between the successive moulding or pouring operations. For supporting the mould-boards, moreover, extensive and expensive crane installations or the erection of strong frames are required. The mounting and operating of such cranes causes considerable difculties and requires much staii and time. Such cranes, moreover, occupy much space and impede the supply of concrete to the structure to be moulded.

The main object of my invention is to remove said inconveniences and to provide a mouldboard apparatus of the said kind which greatly facilitates and simplifies the elevation of the mould-boards so .thatthe building can be erected much more rapidly and at considerably reduced costs.

A further object of my invention is to provide an apparatus of the character referred to above which renders superfluous any cranes or stationary frames from which the mould-boards are suspended.

Further objects and advantages will be apparent from the following description in connection with the accompanying drawingswherein I have shown a preferred embodiment of my invention.

In the drawings:

Figs. 1 and 2 are vertical sections along the line I-I of Fig. 4, showing two different positions of the apparatus.

Fig. 3 is a front view of Fig. 2.

Fig. 4 is a horizontal section along the line 4-4 of Fig. 3.

Figs. 5 to 9 show various details in an enlarged scale.

Fig. 5 is a vertical section showing the means for securing and guiding the mould-board.

Fig. 6 is a horizontal section along the line 6-6 of Fig. 5.

Fig. 7 is a front view of the device for securing the mould-board.

9 Claims. (Cl. 25-131) Fig. 8 is a side view of a supporting device for the lower end of a post of the mould-board.

Fig. 9 is a horizontal section along the line 9-9 of Fig. 8.

The mould-board substantially comprises a number of similar juxtaposed units of which one will be described hereinafter. Each of these units comprises a rectangular mould-board I composed of a number of plates consisting of wood or strong sheet steel. This mould-board I is stiiTened by a series of horizontal channel irons 2 interconnected by three vertical posts, namely two outer posts A and one intermediate post B (see Figs. 3 and 4). Alternatively, the number of such posts may be greater than three. In Figs. 3 and 4, the right half of said unit is not to be seen, but this half is identical with the left half, that is the unit is symmetrical relatively to the axis of the intermediate post B.

Eachof the said three posts is constituted by an inner pair of channel irons 3 and an outer pair of channel irons 4, which pairs are interconnected by diagonal ties or bracing members '5 so as to form a strong lattice girder which shows high bending strength and therefore efflcaciously resists tothe considerable horizontal pressure exerted by the fresh concrete. As it will be seen from Figs. 1, 2 and 3, the posts A and B extend downwards beyond the mould-board I proper.

In the present example it is assumed that a concrete body 6 of great thickness, for instance a dam for a power basin, is to be erected so that in Figs. 1, 2 and 5 the right-hand limit of such body is not to be seen. It will be understood, however, that on the right side of the concrete body 6, there is provided a unit similar to the unit arranged on the left side thereof. In the following, the means for securing said unit comprising the mould-board I and the three posts A and B, will be described.

As shown in Fig. 5, in the concrete body 6 is embedded a slightly conical metal sleeve I on the inner end of which bears a metal disc 8 provided with a central boss 9 into which the rear threaded end of an anchor bolt I0 is screwed. 'Ihe front end of this bolt does not project from the concrete and has a thread II engaging an interior-ly threaded sleeve I2 formed on the rear end of a bolt-shaped anchor head I3 provided near its front end with a circular collar I4. The la-tter is situated in a housing I5 secured to the channel irons 3, a rectangular locking plate I6 being guided in this casing so that it may be displaced in the direction of the arrow in Fig. 7. The lock- With the locking plate I6 in the position according to Fig. 7, the opening I'I is in alignment with the axis of the anchor head I3 so that, when the latter is unscrewed from the anchor bolt I by means of a suitable spanner, the collar I4 is allowed to pass the opening I'I and the anchor head can be removed. If, however, the locking plate I6 is displaced from the position of Fig. '7

to the left, the walls of the slot I8 are moved in front of the collar I4 so that the anchor head I3 may be rotated within the casing I5, but is coupled with the latter and therefore falso with the post A in an axial direction. When, with the locking plate I3 in this latter position, the anchor head I3 is rotated relatively to the anchor bolt I, the post A will be therefore approached to, or removed -from the concrete body 6,"a'ccording to the direction of rotation. 1n this manner, 'the mould 'board I canbe cleared from the concrete.

It is to be noted that the described anchoring device is 'provided not'only on the 'outer posts A, but also A`on the iintermediate post 1B. As l'it is shown Vespecially in Fig. 4, a vertical rod 20 is arranged behind each of the Vposts A (but lnot behind `the post "B-), this -rod yhaving a substantially -Ufshaped crosssection and being provided with vtwo 'opposite-outwardly extending webs 2l. web 22 bearing on "the concrete ybody 6, is provided 'near its 'upperend `with la `round hole passed 'by Va sleeve '23 having a rear threaded end A'which engages the thread II of the anchor boltflll. An outer front flange of this sleeve 23 vzbears against the web 22 whereby Athe rod 23 is secured 'to the concrete rbody '6. The lrod is moreover secured -n'ear `=its llower end-in a similar manner V'to an *anchor Y:bolt vIII situated at a lower :r

level.

As shown in Figs. "and 6, 4two cross 'members 25 are secured to both channel lirons V3 of each post -A by means of bolts 26. Two threaded spindles 2'! screwed into the cross members 25 carryrollers 2`8which'may 'r'oll alongthe Webs'2`l and are guided bythem. Asit is Yto be'seen from Figs. A1, 2 and "3, `eachgpost Ais provided'withtwo pairs 4vof -such rollers 28 so 'that `the posts A "and therefore 'the whole Amould unit areguided in a f-f vertical direction.

According to Figs. 8 and "9, two cross members 259, 43l) `are secured tothe channel Virons 3 "of the intermediate `post B by means of bolts 3I. The rear cross member 30 "has formed thereon a `boss 32 'in which 'a `threaded spindle A`33 is screwed.

Aspherical head 34 of this spindle ienga'ges a shoe-*35 'bearing'onthe concrete 'body'6.

'On the Vlower Aend of each "of 'the :posts A, there is secured a Winch 36whichmay be actuated vby -a hand crank 31. 4A gear wheel 38 of fthis winch meshes with a vertical rack :33 secured ion its'upp'er end vto a :bracket "40 projecting from "the guiding 'rod 120. iFor yeasily'actuatinglthe handcrank `il and theanchor heads I3, th'e mould luni't "lis vprovided with two platforms or lgalleries WI-land -42. lIt will be 'undere sto'o'd that fthe fwinches '36 mayv be actuated by electronioto'rs instead of'hand cranks.

As 'it Vis shownl in Fig. 4, the mould vboard is provided fon `its side ifacing lthe concrete Awith vertical recesses or igrooves 43 ffor vfaccornmodat ing .theiguidingibars 2i). VIn'order ito-'avoid'any interruption of this sidezofrthel' board, l the grooves 43 are coveredbyverticalstripsz Mfofls'heet iron.

.The operationof the apparatus ofmy invention is as follows: The concrete?body-"0 is moulded in successive sections or layers two of which are indicated Ain Figs. il `and i 2, .vli'zfon'e layer between the-,levels X and Y, -fandthe other'b'etween 4 the levels Y and Z. In Fig. l three superimposed anchoring devices as described above are generally indicated with a, b .and .c,the vertical distances 'between lthese Vgdevi'ces corresponding to the height of vthe concrete layers.

.It is assumed that at a given moment the top Vsurface of the 'concrete set is at the level Y.

ith'isstage the mould unit is held in position by the posts A and B being secured to the concretebody by 'anchor bolts Ill and anchor heads .13 arranged at b.- The guiding rods 2D associated -to th'ewtwo posts A, are in such position that their upper ends are substantially at the same level as the top surface of the mould board I, and the rods 20 are fixed by means of the threaded sleeves 23 eng-aging itheanchorlbolts I.

-At the Vposition `c ithe members 'I, v"8, L'I-, 4I3 and I5 are now lsecured to both -posts A, as well 'as to-the-p'oStB so that the conical nsleeves I land the anchor bolts I Il, :the 'relative concentric `position A'of which is :secured by any 'desired means,l are carried by the 4posts A land B respectively. Now the :concrete Elayer vbetween 'the levels -Y and Z is `poured whereby the sleeves *'I Aanddiscs 8 situate'dat'c arefembed'ded in theconcrete. 'It will "ce seen that the horizontal lpressure exerted by -the fresh concrete upon vthe Amould board I, is transferred by the posts A and B and the anchor bolts I3 at b to fthe concrete alreadyset of the llast but one layer. This lpressureexerts' a "moment fon the Amould 'board I, 'which :tends to tilt the ilatter about the anchors at "b in 'an anticlockwise f'direction. aThis tilting vmoment is resisted to bythe fa-ct :that Vthe lower fend of vthe intermediate 4postfl jbears against the concrete body t by means -of -the-spindle '33 and 'the shoe 35 (see'fFigs. i8 and 9),'whilstthe lateral Lrims-of thev rollers '23 of theposts A bear against the webs f2-I *of vthe guidinglrods 20.

After the concrete -of the last layer has sumciently set, the six anchor heads I3 of 'the posts A and =B at the positions b and -c are .removed so that the mould unit is now supported 'by the Winches 36-'of -both vposts A. The weightY o'fLthe unit is transferred from the Winches 36"to the rac-ks F319 fand v,further v'to itherods 20 which '.inLturn' are supportediby theian'chor -bolts 'I0 'situated 'at b V`ando. fNow the-cranks '37 of both Winches 3E, are :actuated vwhereby the unit is lifted to Athe position of Fig. 2, the unit being guided .during this movement vby the'` cooperating vrollers 4428 and rodszZ. Y

`For Velevating the guiding rods 2li 'the fellow? ing manipulations are required. At :'rst the' anchor head I3 Vof the intermediate post "B .is screwed fon the associated "anchor vbolt j I'iJ "at c audit-hen theithreaded-s'leeves 23fof1one of .thel posts for'instanceofthe left one, areA removed whereby the rod i2!) associated with -this post is released. In this stage the unit is supportedlby the anchor bolt I3 of the intermediate'pos't'Aat c and byithe winchfofithe `right post Nowthe winchfof 'the 4left-post A is actuated; Owing tol the fact that the mould unit "andtlierefore also this Winch is fixed relatively'to th'e-'concreteb'ody @,Zt'heactuation ofthewinch will-resultin elevating the rod associated therewith. After thisfrod islif-tediby'thehe'iglit of va concrete layer, `it'is xed by applying the threaded sleeve 23 atc, whereupon the-anchor-head I3 isapplied to-the anchorLbolt-IO-'at `this place. Y

v.N ow thefrod 20 associated yvs'rith the fright post A is released by removing the threaded-sleeves`2`3 oftherpostatfbv and c vso that this 'rod'can'ibfel elevated by actuating the crank `31'. After the threaded sleeve 23 and the anchor head I 3 is brought in position again at c, the described operating cycle is completed and is then repeated.

The anchor bolts Ill which are no longer used, are unscrewed from the boss 9 of the discs 8 so that they can be removed. Also the sleeves 'l can be drawn out from the concrete owing to their conical shape. It is to be seen therefore that merely the discs 8 remain within the concrete, Whereas all other anchoring members can be reused again and again.

Various modications of the described embodiment of my invention are possible within the scope thereof. For instance, the guiding rods may be formed themselves as racks so that the Winches engage the same directly and separate racks are dispensed with. The elevating device carrying the mould unit and being supported in turn by the concrete directly or indirectly, may be constituted by a pulley tackle or similar device and may be actuated by electrical power, hydraulically or by means of compressed air. The guiding rods 29 may be lifted by hand, instead of by means of an elevating device. It will be understood that the mould apparatus may be used also for concrete structures the lateral faces of which are not vertical, but inclined. These faces may be, moreover, curved in vertical and/or horizontal direction. In the last case, the adjacent mould boards include obtuse angles with each other. A desired inclination of these boards in a vertical direction can be adjusted by suitably turning the spindles 21 and 33.

What I claim is:

1, A mould-board apparatus for building up concrete bodies by moulding vertically successive layers, Which comprises a mould-board, a plurality of upright posts secured to and extending downwardly beyond said board, a plurality of Winches each of which is secured to one of said posts, a plurality of racks engaging said Winches and arranged behind and parallel with said posts, and means to detachably secure said racks to the concrete body.

2. A mould-board apparatus for building up concrete bodies by moulding vertically successive layers, which comprises a mould-board, a plurality of upright posts secured to said board, a plurality of Winches on said posts to lift said board, a plurality of racks engaging said Winches and temporarily secured to the concrete body, and means to temporarily secure said posts to the concrete body, said last named means comprising an anchor bolt having its front end within the concrete, and an anchor head engageable with this end and securing one of said posts thereto.

3. A mould-board apparatus for building up concrete bodies by moulding vertically successive layers, as claimed in claim 2, wherein said anchor bolt is surrounded by a conical sleeve embedded in the concrete, a locking member embedded in the concrete being arranged behind said conical sleeve, the rear or inner end of said anchor bolt being engageable with said locking member.

4. A mould-board apparatus for building up concrete bodies by moulding vertically successive layers, which comprises a mould-board, a plurality of upright posts secured to said board, a plurality of guiding rods detachably secured to the concrete body and arranged behind and parallel with said posts to guide the latter in an upward direction, said board being provided with a plurality of vertically extending recesses arranged so as to accommodate said guiding rods, an elevating device on said posts to lift said board, and

means detachably secured to the concrete body to support said elevating device.

5. A mould-board apparatus for building up concrete bodies by moulding vertically successive layers, which comprises a mould-board, a plurality of upright posts secured to and extending downwards beyond said board, a plurality of guiding rods detachably secured to the concrete body and arranged behind and parallel with said posts, a plurality of rollers rotatably mounted on each of said posts and cooperating with the guiding rod associated therewith, a Winch on each of said posts, and a rack engaging said winch and having its upper end secured to the guiding rod associated therewith.

6. A mould-board apparatus for building up concrete bodies by moulding vertically successive layers, as claimed in claim 5, wherein said rollers are mounted on said post so as to be adjustable relatively to the latter towards or from the concrete body.

'7. A mould-board apparatus for building up concrete bodies by moulding vertically successive layers, as claimed in claim 5, wherein at least one of said posts has near its lower end a distance member bearing on the concrete body, said distance member being adjustable so as to vary the distance between said post and said concrete body.

8. A mould-board apparatus for building up concrete bodies by moulding vertically successive layers, which comprises a mould-board, a plurality of upright posts secured to said board, an elevating device arranged on said posts to lift said board, means secured to the concrete body to support said elevating device, and a plurality of devices to detachably secure each of said posts to the concrete body, this device comprising an anchor bolt having its front end threaded and situated within the concrete, an anchor head engageable with said threaded end and situated in front of the concrete body, and a locking member to couple said post with said anchoring head in a direction towards or from the concrete body, but to allow said anchor head to be rotated about its axis.

9. A mould-board apparatus for building up concrete bodies by moulding vertically successive layers, which comprises a mould board, means for guiding said board in an upward direction relatively to the concrete body, a plurality of upright posts secured to said board and extending downwardly therefrom, an elevating device on said posts below said lboard -to lift the latter, an anchor-bolt arranged in the concrete body and having its front end within the latter, a sleeve engageable with this end and supporting said elevating device, a conical sleeve embedded in the concrete and surrounding said anchor bolt and said first named sleeve, a locking member embedded in the concrete behind said conical sleeve, the inner end of saidv anchor bolt being engageable with said locking member.

FRANZ SCHARSACH.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Records Jan. 3, 1950 

